Phenalenyl in a Different Role: Catalytic Activation through the Nonbonding Molecular Orbital
作者:Sudipta Raha Roy、A. Nijamudheen、Anand Pariyar、Anup Ghosh、Pavan K. Vardhanapu、Prasun K. Mandal、Ayan Datta、Swadhin K. Mandal
DOI:10.1021/cs5010695
日期:2014.12.5
We have demonstrated that the nonbonding molecular orbital (NBMO) of the phenalenyl (PLY) cation can be used as a Lewis acid catalyst for different organic transformations. Detailed computational and spectroscopic studies for the aminolysis reaction of epoxide reveal that this catalysis works through a different mechanism, and the phenalenyl cation activates the amine moiety using its empty NBMO, which triggers the epoxide ring-opening reaction. It has been shown that the energy of the NBMO of PLY cation plays a key role in modulating the catalytic activity. This study establishes that the cationic state of phenalenyl unit is useful not only for construction of the spin memory device by external spin injection using its NBMO, but in addition, the same NBMO can act as an organic Lewis acceptor unit to influence the catalytic outcome of a homogeneous reaction.
Microwave-Assisted Ring Opening of Epoxides: A General Route to the Synthesis of 1-Aminopropan-2-ols with Anti Malaria Parasite Activities
作者:Aélig Robin、Fraser Brown、Noemí Bahamontes-Rosa、Binghua Wu、Eric Beitz、Jürgen F. J. Kun、Sabine L. Flitsch
DOI:10.1021/jm070553l
日期:2007.8.1
A series of 1-aminopropan-2-ols were synthesized and evaluated against two strains of malaria, Plasmodium falciparum FCR3 (chloroquine-resistant) and 3D7 (chloroquine-sensitive). Microwave-assisted ring opening of epoxides (aryl and alkyl glycidyl ethers, glycidol, epichlorohydrin) with various amines without catalysts generated the desired library of beta-amino alcohols rapidly and efficiently. Most of the compounds showed micromolar potency against malaria, with seven of them having IC50 values between 1 and 10 mu M against both Plasmodium falciparum strains.
BAECKVALL, J. -E.;BYSTROEM, S. E., J. ORG. CHEM., 1982, 47, N 6, 1126-1128
作者:BAECKVALL, J. -E.、BYSTROEM, S. E.
DOI:——
日期:——
ERHARDT, P. W., SYNTH. COMMUN., 1983, 13, N 2, 103-113
作者:ERHARDT, P. W.
DOI:——
日期:——
Synthesis of aryloxypropanolamines via a palladium-promoted oxyamination